'With an estimated 100,000 health and fitness apps available on the two leading smartphone platforms, iOS and Android, it seems there is an app for everything – from tracking your bowel movements, to practising your pimple-popping technique.'

Carol Maher, Senior Research Fellow in Physical Activity, Sedentary Behaviour and Sleep, UniSA provides some tips on what to look for in a health app:

Photo: Obviously you'll need to delve into what data each app requests access to before agreeing to install it. Hence this photo of a delved paddock; underlying clay has been delved up into the sandy topsoil to improve water retention and hence crop yields. Delving a paddock is expensive; the paddock first needs to be ploughed with deep tines to bring up the clay which requires a powerful crawler tractor, then levelled for cropping.